So I had unprotected sex last week for the first time. And by unprotected I mean without a condom. I'm on birth control but it was the first time a guy has ever went inside me. I take my pills like I'm supposed to and my period came on time a week later. But I feel different I've been having headaches and cramps and I NEVER have cramps. Someone please tell me I'm stressing so bad about it I'm making myself sick.